LED backlight source, backlight source module and display device

Abstract

The invention discloses an LED backlight source, a backlight source module and a display device, and relates to the technical field of display. The LED backlight source comprises a substrate, a plurality of LED chips, a prism-shaped light guide structure with an refractive index of n1, and a first medium; each LED chip comprises a first light emitting surface and at least one second light emittingsurface; the first light emitting surface is located on one side, away from the substrate, of each LED chip; the plane where the second light emitting surfaces is located intersects with the substrate; the prism-shaped light guide structure is arranged between the adjacent LED chips, and is located in a space defined by two adjacent second light emitting surfaces in the adjacent LED chips; the first medium is applied between the LED chips and the prism-shaped light guide structure, and has a refractive index of n2, wherein n1 is greater than n2; and at least part of light emitted by the second light emitting surfaces of the LED chips is emitted through the light emitting surfaces of the LED backlight source after being transmitted through the prism-shaped light guide structure, and the light emitting surfaces are parallel to the plane where the first light emitting surfaces are located. Therefore, the light utilization rate and the light uniformity of the light source can be improved.

Description

technical field [0001] The present invention relates to the field of display technology, and more specifically, to an LED backlight source, a backlight source module and a display device. Background technique [0002] At present, the penetration rate of LED as a backlight in the field of liquid crystal panel display has exceeded 90%. There are mainly two types of backlight module structures: side-in and direct-in. The side-in LED backlight is to install the LED light source on the side of the light guide plate. After the light emitted by the LED enters the light guide plate, it is reflected and scattered by the reflector and the dot The disadvantage of exporting light is that the contrast of the formed picture is relatively poor, and local dimming cannot be performed. The direct-lit LED backlight has gradually become the mainstream trend in the market because it presents images more accurately and exhibits excellent color and light-dark contrast effects. [0003] The direc...

AI Technical Summary

Problems solved by technology

[0004] Usually, in a direct-lit LED backlight module, there is a certain distance between adjacent LED chips. When the LED backlight emits light, there will be a dark phenomenon because there is no illuminant in the above distance, which will cause The LED backlight has a bad phenomenon of starry sky, that is, the brightness of the corresponding position of the LED chip is high, and the brightness of the adjacent LED chips is low.

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